package always.remember.maple.xuhuang.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * Created by asus on 2017/9/14.
 */

public class CreateMD5 {
    //静态方法，便于作为工具类
    public static String getMd5(String plainText) {
                try {
                    MessageDigest md = MessageDigest.getInstance("MD5");
                    md.update(plainText.getBytes());
                         byte b[] = md.digest();
                         int i;
                        StringBuffer buf = new StringBuffer("");
                        for (int offset = 0; offset < b.length; offset++) {
                                i = b[offset];
                                 if (i < 0)
                                        i += 256;
                                 if (i < 16)
                                         buf.append("0");
                                 buf.append(Integer.toHexString(i));
                             }
                        //32位加密
                         return buf.toString();
                         // 16位的加密
                         //return buf.toString().substring(8, 24);
                     } catch (NoSuchAlgorithmException e) {
                         e.printStackTrace();
                         return null;
                     }
    }
}
